[INFO] updating cached repository https://github.com/jauhien/iron-kaleidoscope
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] fed9a75aa211a829a0b2b099f4bcfcef2079d034
[INFO] checking jauhien/iron-kaleidoscope against master#30ca215b4e38b32aa7abdd635c5e2d56f5724494 for pr-66037
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjauhien%2Firon-kaleidoscope" "/workspace/builds/worker-6/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jauhien/iron-kaleidoscope on toolchain 30ca215b4e38b32aa7abdd635c5e2d56f5724494
[INFO] running `"/workspace/cargo-home/bin/cargo" "+30ca215b4e38b32aa7abdd635c5e2d56f5724494" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/jauhien/iron-kaleidoscope
[INFO] finished tweaking git repo https://github.com/jauhien/iron-kaleidoscope
[INFO] tweaked toml for git repo https://github.com/jauhien/iron-kaleidoscope written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/jauhien/iron-kaleidoscope already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+30ca215b4e38b32aa7abdd635c5e2d56f5724494" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /workspace/builds/worker-6/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] [stderr] If you want to try to generate the lock file without accessing the network, use the --offline flag.
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/workspace/cargo-home/bin/cargo" "+30ca215b4e38b32aa7abdd635c5e2d56f5724494" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Updating git repository `https://github.com/jauhien/iron-llvm.git`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+30ca215b4e38b32aa7abdd635c5e2d56f5724494" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+30ca215b4e38b32aa7abdd635c5e2d56f5724494" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 61bcf5c779b8ec2bb4c7ef7b162350115b7406a6b41742e121c616cee0d19bb1
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "61bcf5c779b8ec2bb4c7ef7b162350115b7406a6b41742e121c616cee0d19bb1"`
[INFO] [stderr]    Compiling regex-syntax v0.6.13
[INFO] [stderr]    Compiling ucd-util v0.1.5
[INFO] [stderr]    Compiling regex v0.2.11
[INFO] [stderr]    Compiling utf8-ranges v1.0.4
[INFO] [stderr]     Checking bitflags v0.3.3
[INFO] [stderr]    Compiling regex-syntax v0.4.2
[INFO] [stderr]    Compiling cmake v0.1.42
[INFO] [stderr]    Compiling llvm-sys v0.2.1
[INFO] [stderr]    Compiling aho-corasick v0.6.10
[INFO] [stderr]     Checking docopt v0.6.86
[INFO] [stderr]    Compiling regex-syntax v0.5.6
[INFO] [stderr]    Compiling iron_llvm v0.0.1 (https://github.com/jauhien/iron-llvm.git#401fbb93)
[INFO] [stderr]    Compiling regex v1.3.3
[INFO] [stderr] error[E0635]: unknown feature `convert`
[INFO] [stderr]   --> /opt/rustwide/cargo-home/git/checkouts/iron-llvm-200ba2503a7438b1/401fbb9/src/lib.rs:12:12
[INFO] [stderr]    |
[INFO] [stderr] 12 | #![feature(convert)]
[INFO] [stderr]    |            ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0635`.
[INFO] [stderr] error: could not compile `iron_llvm`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "61bcf5c779b8ec2bb4c7ef7b162350115b7406a6b41742e121c616cee0d19bb1"`
[INFO] running `"docker" "rm" "-f" "61bcf5c779b8ec2bb4c7ef7b162350115b7406a6b41742e121c616cee0d19bb1"`
[INFO] [stdout] 61bcf5c779b8ec2bb4c7ef7b162350115b7406a6b41742e121c616cee0d19bb1